Packaging information
| Package | Pins VQFN-HR (RYY) | 30 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the TAS2781
- Integrated DSP for audio processing
- 24-V Supply for class-d output stage
- Y-Bridge multi-level supply architecture
- Hybrid-pro external boost control algorithm
- Ultrasonic output support up to 40 kHz
- 25 W, 1% THD+N (4 Ω, 18 V)
- 30 W Maximum output power, 10% THD+N
- 82% at 1W, 4 Ω, PVDDH = 12 V, PVDDL = 3.8 V
- 83% at 1W, 8 Ω, PVDDH = 18 V, PVDDL = 5 V
- 84% at 1W, 4 Ω, PVDDH = 18 V, PVDDL = 5 V
- 90% at 15W, 4 Ω, PVDDH = 18 V, PVDDL = 5 V
- 93% at 15W , 8 Ω, PVDDH = 18 V, PVDDL = 5 V
- <0.5 µA in Hardware Shutdown Mode
- AVDD: 1.8 V
- IOVDD: 1.8 V/ 3.3 V
- PVDDL: 2.7 V to 5.5 V
- PVDDH: 3 V to 24 V
- SDOUT for echo cancellation
- I 2S/TDM: 8 channels of 32 bits up to 192 KSPS
- I 2C with fast mode+ or SPI
- Inter-chip communication bus
- 16 kHz to 192 kHz sample rates
- Real-time IV-sense for speaker protection
- Dynamic range compressor
- Brownout protection with power limiter
- Multi-channel balancing communication
- Over power and low battery protection
- PVDDH/ PVDDL supply tracking limiters
- Thermal and over current protections
- Thermal foldback
- Post filter feedback and slew rate control
Description for the TAS2781
The TAS2781 is a mono, digital input Class-D audio amplifier optimized for efficiently driving high peak power into loudspeakers. The Class-D amplifier is capable of delivering 25 W of continuous power into a 4 Ω load with less than 1% THD+N at a supply voltage of 18 V. The broad voltage input range and the high output power makes this amplifier versatile enough to work with battery or line powered systems.
An on-chip DSP supports Texas Instruments Smart Amp speaker protection algorithm. The integrated speaker voltage and current sense provides for real-time monitoring of loudspeakers.
Y-Bridge power architecture improves amplifier efficiency by internally selecting the supplies for optimal headroom. Brownout prevention scheme with adjustable threshold allows reducing the gain in signal path when the supply drops.
The Hybrid-Pro algorithm allows user to optimize efficiency and improve battery life by controlling the external power supply.
Up to eight TAS2781 devices can share a common bus via I 2S/TDM and I 2C/SPI interfaces.
The TAS2781 is available in a 30 pin HR-QFN package for a compact PCB footprint.